AppSDK, dns-sd( mdns ), DeviceWatcher

[onslauth]

I am trying to create an app that can advertise a service that is automatically found by a client. My hopes were to use dns-sd for this so that the user would not need to enter details.

I managed to register a DnssdServiceInstance with the service name test._myservice._tcp.local. This service can then be seen on a second computer on the network using dns-sd -B _myservice._tcp local. However I cannot query the instance which should be possible using dns-sd -L test _myservice._tcp local. I inspected the packets using wireshark and do not see the host replying at all.

Failing the above, I implemeted a DeviceWatcher with a query string set to System.Devices.AepService.ProtocolId:={4526e8c1-8aac-4153-9b16-55e86ada0e54} to see if it could enumerate the instances and found that it doesn't even find test instances created with the dns-sd tool. Inspecting the traffic while running the DeviceWatcher doesn't seem to produce any network traffic either.

I also tried to use the DeviceInformation.FindAllAsync( ) function call, but it only seems to return physically connected hardware, and nothing on the network at all, and when using the query string above there are zero entries.

Am I running into a permission or capability issue here? Or has this functionality not been implemented?

[onslauth]

Updating the question because I discovered that using a DeviceWatcher created with DeviceInformation.CreateWatcher does work. It just takes quite a long time to return a result for a service instance running on the same machine as the DeviceWatcher, in this case 300097ms.

However the service is still not queryable by using the dns-sd command line tool.